Year	US Dollars
1961	32759998.32153
1966	25579999.92371
1967	7260000.22888
1969	59999.99866
1975	32020000.45776
1976	86629997.25342
1977	83349998.47412
1978	100010002.13623
1979	78069999.69482
1980	140160003.66211
1981	121430000.30518
1982	129660003.66211
1983	147089996.33789
1984	171869995.11719
1985	176339996.33789
1986	228690002.44141
1987	153910003.66211
1988	138119995.11719
1989	153919998.16895
1990	167729995.72754
1991	156960006.71387
1992	162059997.55859
1993	169460006.71387
1994	173699996.94824
1995	149100006.10352
1996	154529998.7793
1997	163009994.50684
1998	192619995.11719
1999	201020004.27246
2000	152160003.66211
2001	128929992.67578
2002	141960006.71387
2003	190360000.61035
2004	172660003.66211
2005	191440002.44141
2006	156630004.88281
2007	167830001.83105
2008	212880004.88281
2009	194369995.11719
2010	326500000
2011	232080001.83105
2012	245139999.38965
2013	235619995.11719
2014	222009994.50684
2015	169270004.27246
2016	125589996.33789
2017	130710006.71387
2018	85379997.25342
2019	157190002.44141
2020	157720001.2207
2021	141899993.89648